38 SCIENCE AND SOIL 



initial molecules whose condensation produces proteids, but this 

 is largely speculative. 



The following list illustrates some instructive relationships of 

 important and well-known compounds: 



HCOOH, or H C OH .... Formic acid. 



II 



O 

 CH 8 COOH, or H 3 =C C OH . . Acetic acid (the acid in vinegar). 



O 

 CH 2 (NH 2 )COOH ...... Amido acetic acid. 



COOH 



COOH, or (COOH) 2 ..... Oxalic acid. 

 CH 2 COOH 



CH 2 COOH ...... . . Succinic acid. 



CH 2 COOH 



I 

 CH(NH 2 )COOH ...... Amido succinic acid (the aspartic acid 



in pumpkin seed, beets, etc.). 

 CH 2 CONH 2 



CH(NH 2 )COOH ...... Amido succinamic acid (the asparagin 



found in asparagus, in beans and 

 peas, and in many seeds when ger- 

 H minating). 



H CT C H 



C 6 H 6 , or | || ... Benzene. 



H C. C H 



H 

 C 6 H 5 OH ........ Hydroxy benzene, or phenol (carbolic 



acid). 

 C 6 H 5 NH 2 ........ Amido benzene, or anilin. 



C 6 H 3 (OH) 3 ........ Trihydroxy benzene, or pyrogallol 



(pyrogallic acid). 

 C 6 H 3 (NH 2 ) 3 ........ Triamido benzene. 



C 10 H 14 N 2 ......... Dipyridyl hexahydrid, or nicotin (the 



alkaloid of tobacco). 

 C 17 H 21 NO 4 ........ Morphin (the alkaloid of opium, from 



the poppy). 

 C 2 iH 22 N 2 O 2 ........ Strychnin (the alkaloid of nux vom- 



ica). 

 Q^f^NesOreSs ....... Albumen, or the white of egg. (For- 



mula suggested by Schutzenberger ) 



